Cathode.



No. 724,862. PATENTED APR. 7, 19.03.

' C. J. HENRY.

CATHODE.

APPLICATION FILED AUG. 6, 1902.

N0 MODEL.

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rUNITED STATES PATENT OFFICE;

CHARLES JOHN HENRY, OF PERTH AMBOY, NEV JERSEY.

i `cATH'oDla.v

SPECIFICATION forming part of Letters Patent No. 724,862, dated. April7, 1903. Application filed August 6, 1902. Serial No. 11'8,665. (Nomodel.)

To aidu/hom, it may'concern:

Be it known that I, CHARLES JOHN HENRY, a citizen ofthe. United States,residing at Perth Amboy, in the county of Middlesex and State of NewJersey, have invented, certain newand useful Improvements in Cathodes,of which the following is a specification.

Myinvention has relationto new and useful improvements irl-plates orelements employed as cathodesv or deposit-plates in the production ofmetallic `sheets by electrodeposition. y

The objects of the invention are to provide a plate of the kindmentioned which will be of an improved and simplified construction andwherein the usual Wooden supportingframe for the cathode or depositplate and also the usual cumbersome insulating means for preventingdeposits upon the edges of the plate may be dispensed with.

A further object isto so construct the plate that the metal maybeprevented from becoming deposited upon the edge or marginal facesthereof, andV thereby preventing the ready removal of thedeposit-sheets.

A further object is to provide an efficient means whereby the sheetformed by the metallic deposit upon the face of the cathodeplate may beremoved or stripped therefrom without cutting or tearing the sheetformed or allowing any of the deposit to remain upon the plate.

I have fully and clearly illustrated my invention in the accompanyingdrawings, whereint Figure l is a View in elevation of a plateconstructed in accordance with myinvention and a deposit-sheet thereon.Fig. 2 is a view in elevation, showing a plate upon which has beendeposited a sheet of metal which is shown partially stripped from theplate and also a portion of the insulating material removed therefrom.Fig. 3 is a transverse sectional view taken on the line 3 3 of Eig` 1.

Referring to the drawings, 1 designates a cathode or deposit plate'whichmay be made from copper, lead, or any other suitable metal orcomposition. I have shown this plate as being preferably oblong inshape; but it is obvious that it may be of any form to suit it to thepurposes for which it is employed and of any area and thickness desired.Formed upon each face of this plate lis a central raised or, superficialarea 2, the surface of which is polished toK provide a smooth andsensitive surface and uponrwhich the metallic deposit is received andheld to form the sheet. At its upper portion the plate is provided Withany suitable means by which it may be suspended or immersed Within theelectrical bath and whereby connection may be made with the properelectrical circuits. I have shown the plate as being provided withapertures 3, by which the connections above mentioned may be made.Partially surrounding the body of the plate is a projecting flange 4,which flange is arranged centrally of the edge faces of the plate andextends longitudinally thereof and provides both faces of the plate witha marginal cutaway portion or rabbet 5, 'which may be of such depthand.width as may be desired or required. Disposed transversely of theplate, adjacent to the upper portion thereof, is a channel or groove 6,which extends entirely across the plate and opens ateach of its endsinto the rabbets formed bythe centrally-disposed ianges upon therespective sides of the plate and provides the raised or supercial area0f theplate with a continuous marginal channel or recess. At determinedintervals the flange t is provided with perforations 7, arrangedlongitudinally of the said lianges and lopening upon the front and rearfaces thereof, substantially as shown in the drawings in Fig. 2. Withinthe said marginal channel or rabbet and the transverse groove 5 I placean insulating material 8, such as putty, which is unaected by thesolution in the bath and which is applied to the plate while in aplastic state. This material. when applied has sufficient pressureexerted thereon to force it through the perforations 7, and itwill thusbe seen that the insulation upon both faces of the Iiange -t will bejoined by the portion extending through the perforations andwhen allowedto set the said insulation will be held securely in position about theedges of the superficial area. -When the material is placed upon theflanges of the plate, its surface is smoothed or scraped 0E until it isflush vor coincident with the superficial or body portion of the plate,substantially as shown, or may be permitted to project a slight distanceabove the face of the plate.

The manner in which my improved plate is used is as follows: After theinsulating material has been applied to the marginal rabbets and allowedto harden the surface of the superficial or raised area is covered withany of the Well-known materials to prevent a too close adhesion of thedeposit. The cathode-plate is then immersed in the proper bath and themetallic deposit is made thereon in a well-known manner and is allowedto continue until a sheet of the proper or desired thickness is made.The plate4 is then removed, and the metallic sheet may be strippedtherefrom by raising any of the corners of the sheet and pulling thesame away from the cathode-plate.

From the above description, taken in connection with the drawings, itwill be seen that my improved construction of the plate and the mannerof applying the insulating material will conne the area of metallicdeposit to the superficial or raised portion of the cathode-plate,inasmuch as the insulating material eectually prevents any deposit uponthe marginal edges of the plate It will also be seen that the edges ofthe sheet formed by the metallic deposit Will not be held upon the platein any manner and that the sheet may be stripped or removed from thecathodeplate as an entirety without cutting or tearing the same andwithout leaving any of the deposit upon the plate. By my improvedconstruction it is also unnecessary to remove the plate from itsinsulating-frame in order to facilitate the removal of thedeposit-sheet, and if at any time any portion of the insulation shouldbecome removed or injured the portion damaged may be repaired withoutthe necessity of providing a complete insulation-frame.

Having thus fully described the invention, what is claimed as new is l.A cathode-plate for receiving removable sheet-metal deposits comprisinga body to receive the deposits having superficial areas, flangessurrounding the opposite side edges and lower end of the plate byforming rabbets at such parts of the body, said flanges havingperforations therethrough, and a plastic insulation applied to theflanges and engaging the perforations.

2. A cathode-plate for receiving removable sheet-metal depositscomprising a portion to receive the deposits having a superficial areawhich is polished to provide a'smooth and sensitive surface, the saidportion having side and end flanges formed by rabbets, and an insulationapplied over opposite sides of the flange and practically flush with theopposite sides of the said portion.

In testimony whereof I aiiix my signature in presence of two witnesses.

CHARLES JOHN HENRY.

